OAK PARK · FLOCK · OVERSIGHT DATA

Oak Park's own published oversight data exposed erroneous Flock-prompted stops.

Local oversight made the error rate visible

WHERE

Oak Park · Cook County · IL

View this place in the Illinois surveillance directory →

Oak Park is unusually useful as an Illinois case because the village published information about traffic stops prompted by its ALPR system. Independent analysis of those records identified erroneous stops attributed to data problems or officer error, rather than relying only on a vendor's advertised recognition accuracy.

Oak Park later ended its Flock program in 2025. The case demonstrates the value of publishing what happens after an automated alert: how many alerts become stops, how many stops are mistaken, what caused the mistake, and what officers did before escalating the encounter.

Why it matters: Camera accuracy is not the same thing as operational accuracy. The meaningful unit is the entire chain from image to roadside encounter.

Sources: Freedom to Thrive Oak Park analysis of village data · Institute for Justice national review

WHY THIS LIBRARY EXISTS

This page preserves the anecdote and its caveats separately from the shorter Why Privacy Matters explainer. The goal is to keep the argument readable without hiding the receipts.